Montalk,
Excellent post to remind us about negative and positive synchs -- thanks for reviewing your great material!
And Eethie,
Yes, you can definitely look at synchronicities as "My higher self guiding me along the path...." if you look at it from the broader perspective of your higher self sometimes setting up these synchronistic situations so you can learn DISCERNMENT.
And any time you can learn discernment, you pick up much-needed spiritual survival skills. So while the synchronicity might turn out to be unpleasant, at least you're learning something from it, and all things are ultimately working together for good 
Until I learned how to distinguish between positive synchs and ones that were thrown in my path to cause distractions and delays, I was way too open to EVERYTHING. And hitting some really bad synchronistic experiences with Matrix type characters taught me FAST to run situations through my own unique "energy meter." That way, I learned to set appropriate boundaries, which I didn't have before. So I only learned discernment by going through some really tough experiences where I embraced synchronistic experiences that led me down some very dark paths, which I then needed to get myself out of. The biggest of these was dealing with stalkers. I mean people in my town who acted all friendly like Montalk describes, pushing hard to get to know me because we supposedly thought alike, shared many of the same beliefs, etc., but then the whole relationship would turn screwy and the person would turn out to be insane. And then they'd stalk me. And the police didn't care. So that was fun. NOT. I experienced this for years with both men and women, most of them were just casual acquaintances, a few were boyfriend types I'd stupidly allowed to get closer. Not good.
An unfortunate side effect of spiritual seeking can be that you open your heart chakra big and wide (in itself a GOOD thing because you are learning to access greater degrees of love) and in so doing you unknowingly embrace EVERYTHING and EVERYONE who comes your way, without first checking to see if he or she is good for you.
To use a food analogy, it's like you get so blissed out about how all food is fabulous and isn't it wonderful that we have the gift of the sense of taste, so you start eating just any food that you find, including poisonous mushrooms, spoiled cabbage, belly button lint, etc. You can fall in love with the whole idea of food yet not realize that certain types of food can actually kill you.
Within interpersonal synchronicities, you can be so blissed out with love and openness and a feeling of "oneness" with others that you forget that there are some characters you probably shouldn't be "one" with! Because for various reasons they might be harmful to you.
So I guess I'd just say it might be helpful for you to notice times when you're just in a great, loving and open space and ready to have adventures....and to be careful in such moments to set the intention that you want to attract positive synchronicities that are truly uplifting and good and fun, not false synchronicities that emulate good ones. And don't hesitate to be very firm and rude to anybody who seems "off." They're usually just bullies who are counting on you being way too nice and passive. And when you call them on their negativity right to their face, they will usually back off. Not easy to do when you'd rather be coasting along on the love and light tidal wave, but sometimes ya gotta protect yourself from unsavory types.
Okay, I've rambled on enough about my views on synchronicities. I think Montalk articulates this subject in a much clearer way than I do.
LipstickMystic aka Jennifer