Are all track spikes removable Is it bad to take them off your shoe and then run with them?

Spikes should be removeable because they wear out pretty easily. If your spikes don't come out there is something wrong with your shoe.

It is only bad to run with your spikes still on when you're not running on track or grass. NEVER run with spikes on concrete or anything else!!! It is not bad to run around with no spikes on your shoes, I do it all the time :)