Almost 20 years ago, my then-DP and I had what we called an Awkward Friend. You know you have an Awkward Friend when it seems that he/she is disproportionately attached to you given the social situation, and doesn't seem to have to social skills to realize when he/she is behaving inappropriately or outside of what is considered to be suitable for societal norms. Sometimes Awkward Friends set off the early-warning stalker-detection alarms, but then you realize, nope, s/he's harmless and not a stalker - just really, terribly, socially inept.
For example, our Awkward Friend (AF) would buy inappropriately expensive gifts for the holidays, meaning they were neither appropriate for casual acquaintances, nor appropriate for someone of his means. We were in a cycling group, and our level of friendship with him and other group members was very casual. You probably wouldn't exchange gifts, but if you did, it would be about right to buy a nother group member something like a coffee mug with a funny cartoon on it. Whereas, AF would buy you something like a new screen for your computer.
Randomly, one day AF brought us a series of animated movies from Japan. He really wanted to lend them to us (this was unsolicited). While we were fans of animated movies (DP was in animation school), we were familiar with that series and really, really were not fans. We found the series to be rather exploitive and misogynistic, so it was bordering offensive to us. We were not interested.
So here is where things fell apart: the polite spine. When "No, thank you" failed, and he insisted that we borrow them, saying: "I thought you might find them interesting. " DP and I used a variation of "I'm afraid that won't be possible." We did not want this big box of VHS videos (as I said, it was 20 years ago)! After many more iterations of "No. Not possible, no." AF finally left, but only after carrying the box back to our kitchen saying: "I really think you'll find them interesting. You can give them back later." Then he went home, leaving his box of stupid movies on our table.
DP's brother had been present for this, looked at us and said: "What the h*ll was that??? You said 'no' and he just left them there!"
In all honesty, now that it's 20 years later, I can't remember for the life of me what happened to the movies. I think DP may have put them in his car and after the next group bike ride, he dumped them back into AF's trunk.
But looking back, I still have no idea what we could have done differently. How do you deal with something like this?
The only thing I don't think we tried was saying: "If you leave these here, they will go in the trash." Since AF was lending
us these movies (albeit against our will) and they did actually have value, we had strong reservations about destroying someone's personal property. I doubt we would have threatened to throw them out.
But as DP's brother said: "What the h*ll?"