Is it unethical to let someone borrow your truck specifically so they can dump trash in the river?
Again, yes.
Is it unethical to have an agreement with someone and break it?
Yes.
Is it unethical to help someone break an agreement?
Yes, especially when all the cheater has to do is notify their partner. Be a decent human and don’t enable other people to be shitty. For fucks sake you guys this is not rocket science.
Is it unethical to dump trash in the river?
Yes.
Is it unethical to let someone borrow your truck specifically so they can dump trash in the river?
Again, yes.
Is it unethical to have an agreement with someone and break it?
Yes.
Is it unethical to help someone break an agreement?
Yes, especially when all the cheater has to do is notify their partner. Be a decent human and don’t enable other people to be shitty. For fucks sake you guys this is not rocket science.