Yes, you can ignite gasoline with static. I am guessing that DOT approved gas cans have carbon particles impregnated in the plastic, otherwise grounding the can would not drain the charge off any part not connected to ground. The vapors (not the liquid), which have very little density per cubic volume are easily ignited. The spark plug in your car does that well. In the older days (pre-fuel ignition) you could "flood your car" and get the plugs all wet with condensed gas and it won't start until the gas evaporates from the plug electrodes..
There have been a number of experiments done with BP and static electricity. There are some pictures on the net of something way more intense... an arc from a high voltage neon lamp transformer into a pile of BP. The carbon in the BP makes it fairly conductive, so the charge passes thru without producing significant heat, and the BP does not ignite. Sure, if you hit it with a lightning bolt it will light, (it will melt rock in fact) but static isn't something to worry much about with BP.
One of the more dangerous things about plastic and static is that it can hold powder grains on the static surface, making it difficult to move the BP reliably. In a plastic powder measure there can be issues with charges getting hung up, and then the next charge gets more than it should. That can happen with not only BP, but smokeless as well.
Fortunately, BP (and smokeless for that matter) quickly cover plastic surfaces with a residue that is conductive. Once this happens the static issue goes away. If you buy a brand new plastic powder measure, or funnel, and want to break it in quicker, wash it with soapy water. Dump the soapy water but do not rinse it, just let it dry. The soap residue is "hydroscopic"... it absorbs minute amounts of water from the air. As it does this, the soapy film becomes "conductive". We are not talking highly conductive... you won't be able to measure it with an ordinary volt-ohm meter. It becomes conductive in terms of many megohms per square, which can be measured with proper equipment.
I design high voltage, low current devices for a living (night vision goggles primarily). I have measured surface leakage due to residue like this zillions of times trying to figure out why something doesn't work right. The conductivity of a slightly dirty hydroscopic film won't conduct enough current to light a light bulb or anything like that, but it will drain away static charge in short order.
Ever get dust all over the screen of your tv set? Static charge attracts dust. Wash the screen with soapy water and then let a light film of it dry on there. It will drain the static off the screen and keep the dust away.
