There should be a lock button or option to keep your favorite gear from accidental deletion. There are times when I accidentally delete my stuff, although rare it happens.
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They already made it so you have to hold the button down to trash something, and the higher level it is, the longer you have to hold the button for, giving you ample time to realise that you're making a mistake. They could tweak the system I suppose, but all you have to do is pay attention.