Yes, iodomethane is commonly used and yes, it can methylate your DNA -- that's bad. But no, sadly, chemists don't really treat this compound with very much respect. Most of the time, MeI is kept in a big-ass bottle in the fridge (stored over copper beads, of course) and syringed out casually. Look, even your stupid picture shows your chemist (who clamps her tiny Sure-Seal bottle like a complete ninny) not in an inert atmosphere and with the hood sash raised to the point where it ain't workin' none. I'll bet some of this intensely deadly chemical is escaping out into the atmosphere! Oh noes! God, it makes me crazy when people resort to chemical scare tactics.
Even better, a quick check of the Aldrich* catalog shows that the only Sure-Seal MeI that Aldrich sells is a 2.0M solution of MeI in MTBE. That isn't used to keep the MeI in -- it's to make sure that the MTBE doesn't evaporate! Oh! Pesticide Action Network -- you've been pwned!
Look, MeI needs to be treated with respect and most chemists could use a refresher in its MSDS. But really, this sort of stuff is stupid. Methyl iodide needs to be evaluated as a pesticide on its own merits, not on chemophobia scare tactics.
UPDATED: Added MSDS above.