By no means.

I used to; it makes sense as a carryover from paying cash most of the time rather than cards, since you'll almost always leave the small chance (if the waiter even brings it back - and indeed, it's fairly normal not to take it in some of the "non tipping cultures" I've visited where a large tip WOULD elicit surprise) and out of habit I used to do it regularly with cards as well.

I still do occasionally, when I hit someplace where the bill is small enough tip amount is going to be much different if I don't use a whole dollar amount.