STATIC ELECTRICITY Ever noticed how weed sticks to a plastic baggie.? Those are trichomes you could be smoking. There are many other reasons, but this is a start.
Kingfish, I have to respectfully disagree. But, I'll start by facetiously responding: have you ever noticed how some icecream sticks to the side of the bowl when you're eating it? Shit happens!
Now, back to the real concern:
Unless and until you've tried it (as I have) you wouldn't be aware that DRIED weed doesn't stick to plastic. At least not in any significant quantities. NOTE: You can experiment with a couple of buds.....or, for an even more "acid" test (if you'll pardon the pun) sprinkle some flaked Oregano into a freezer bag; rotate the bag a couple of times to simulate multiple "handlings" of stored weed. Keeping in mind that your WEED will be in contiguous bud "format", as opposed to flaked or powdered like the Oregano. You'll find that VERY little of even the FLAKED material clings to the bag-sides.
Also, Trichomes go through a contraction/reduction/retraction process as the bud cures (prior to being placed into curing/storage containers), so it's very unlikely that they'll "stick" to the walls of the bag, either. (Otherwise they also be sticking to the glass walls of jars).
So, sorry; I just don't see grounds for your concerns. Certainly not grounds that override all the BENEFITS that bags have over jars. I think the "jar thing" has attained some sort of "cultural appeal" that has no real-life, practical value. BUT, by all means....if you have more concerns (as you've intimated).....let's hear 'em.