[groby_b]

If you think a meeting is pointless, say so. And don't attend.

Yes, sometimes that's hard due to being in a toxic environment, but in that case, a passive-aggressive measure like a meeting cost calculator will go over like a lead balloon too. (Source: I tried ;)

Same goes for "multitasking". If a meeting doesn't have value, don't attend, or leave as soon as that's clear.

If most meetings have no value to you, have a hard look as to why. Sometimes, it's because there's a meeting culture. But sometimes, it's because you're missing the point. (for meeting organizers: Spell out the damn point in the agenda, will you? You have an agenda, right?)