When to signal, or not to...

[TussAgee11]

Something I've been wondering about...

Sometimes I will work with a partner that does not signal when there is a play on the runner. This seems to happen most on casual pick off attempts where everyone in the park knows the runner made it back. If you are BU, should you...

a) Signal everytime, even if no tag attempt was made?
b) Signal only when the 1B tries to put a tag on
c) Never signal

I do B, but some of the people I work with will do A or C.

This also seems to happen on stand up doubles where F6 or F4 will casually place a tag on the runner while trotting the ball back to the pitcher. Is a casual safe signal here acceptable?

Thanks.