Telemarketers' tell

I don't have caller ID, but I always know, right off the bat, if a telemarketer is on the line.

First tell: Call at dinnertime.

Second tell: silence...for several seconds. I know while they are on the line, they are trying to figure out how to pronounce our surname.

Third tell: they never pronounce our name correctly.

Forth tell: they always ask to speak to my hub-nut. Typically, by this point, I've hung up, so they usually don't get that far.