Stickers are one of the easier things to freecycle because they can be mailed and don't require special delivery or meet-ups to give away.

The adhesive on stickers means they cannot be recycled, regardless if the stickers are paper or plastic.

If your stickers are bound for the trash anyway, why not try use them to offset your need for new tape? For instance when you wrap presents or need small bits of tape around the house, try using a sticker instead. 

When you can reuse your things to offset your need to buy new stuff, you are helping the planet in a small way.