Ship Your Enemies Glitter VS Give Back Box

The sign idea is smart if you could put it in a place that's very visible but can't be grabbed by the neighbor. Https://shipyourenemiesglitter.com/ is an option Maybe there are free newspaper/magazine subscriptions you could sign them up for to receive in the mail. Source: 11 months ago

Others ship shit or a glitter bomb for them to open after they steal it! The shit senders are in the US but don't ship to Canada - there was a local one in Caledon, but they've stopped last year. Basically they box up a pile of horse manure, cow shit or zoo shit then mail it to your enemy. As fun as that sounds .. I think the glitter will be more evidence! Source: 11 months ago

Can get one of those cards filled with glitter. Companies like Shop Your Enemies Glitter provide such a service. Source: about 1 year ago

Envelopes full of glitter. https://shipyourenemiesglitter.com/. Source: about 1 year ago

Here you didn’t ask for it, but it is what you are looking for. Source: about 1 year ago

As for the cardboard, it's easy to recycle, pretty efficiently. Plus you might look into this program: Https://givebackbox.com/amazon. Source: over 1 year ago

Do you think the item is in good enough condition to give to a friend for free? -- Try giving your items to friends and family. Otherwise, set the item at the end of your driveway and post it to Nextdoor and/or a Freecycle group on Facebook. If donating would make you feel better by helping someone else, take it to Goodwill, Savers, Salvation Army, a local library, a school, etc. Some donation centers even pick up... Source: almost 2 years ago

At first, I thought OP's mention of "donation boxes" were actually these Give Back Boxes which would be filled with people's used items, but then OP clarified it to be mostly private label Chinese goods which makes more sense. Source: about 2 years ago