This is why I flush mine. I'm afraid of what might happen to them1 Clarence goes into the wastebasket in my bathroom for used Qtips. He loves 'em.
Our sewer system won't handle them. But if yours does, that's great! We live at the bottom of a apartment complex and it seems everytime someone does flush theirs, the sewer water backs up in my apartment, since we are on the lowest side of the pipes. It's not pretty! (Happens about twice a year.) Rotor Rooter comes out and they run a snake line down the pipe, and it ALWAYS snags tampons.
But prevention with Spike is the best way to deal with her. Just when I think I have her figured out, she goes and does something else equally annoying.