Yes. Grinding even optional, some chance they might sprout, if so, pull them out and toss them right back in or just turn them under into your worm bin, just more food for them. If ground into a fine powder like flour, they might get a bit hot or lumpy with water. My suggestions: don't grind excessively fine (or not at all), and don't add too much at once and in one spot - especially at first until you see how the worms and the environment react.

Of course, feeding them to birds isn't really wasting either. For me, what I tend to do with things like this is either leave them for birds or just cast them (unground) around parts of the yard (in my case, treed or bushed areas or rough bits of lawn where I don't care if something sprouts), and skip the composting step. Birds, squirrels, earthworms or various will eventually consume them. I'll do this with various flour if spoiled as well.

Lots of people find that pumpkin seeds will sprout and grow in compost or yard readily, obviously depends if they're still viable - and whether or not that bothers you.

I have 6 feral cats around my house so if I put seeds out for birds the cats kill the birds. Yes we trapped and got the cats fixed we had about 22 at one point. I live on a dead end street in a rural area and people just dump animals here. We kept 6 of the 22 cats they keep snakes and mice away. Plus they eat our food scraps too. Thanks for the info on the seeds, I just don’t want to give them anything that may be toxic to them. We started the worm bin exactly 1 month ago and they are doing great. They look fatter than when I got them so I’m doing something right.

I'd soak the seeds over night and then add them to the bins. That would give the seeds 2 simple choices: sprout and then die in the darkness or grow moldy. The worms would be to handle either scenarios quite easily.

Having that many cats around is a good reason to not spread birdseed about ).

In general, if concerned about whether a particular thing can be put in the bin - just test it first in modest amounts, and always avoid overfeeding and adding large amounts of something untested.

Since you have a rural property, you might be able to toss everything else in a regualr compost pile.

Quick story, I’m sitting under my old oak tree with my feral cats while they ate. Now granted nothing comes around when the cats are eating. Squirrels stay in the trees and mice hide. Well this day they are eating birds are singing and I look up in the oak tree and I see a squirrel chewing on a small branch. So I sit and watch the wildlife while I drink my beer. When all of a sudden I see this squirrel cock back his arm with this stick in his hand and throw it at me. I wish I could have got that on camera. I don’t know if he was aiming at me or the cats. Life is short so grab a beer and enjoy time with nature but be careful or they will hum something at you when your not looking.