depends what you enkoy doing
is it a good idea to send small children to daycare for the first years of their lives
FAIL!
a good idea is learn to spell first
answer the easiest question first
stop the boat is a good idea
Meeting someone for the first time through the intenet is never a good idea ?
The opposite of a good idea would be a bad idea. Depending on how bad you could also say terrible idea.
Some can be good, but they are fairly out of date now, you really need to do research to find a good one. Checking website reviews on them is always the best idea first.
being incredibly straightfoward/forceful. not a good idea on a first date.
no
If you are first cousins, that is not a good idea at all.
no try to comfort them first