I had a custom that any time I left a company, I would throw a little party and sponsor Pizzas delivered for the crew. All salaried managers were let go when the plant was sold, no notice, just temp security hired when we were to be walked out. The next Friday I had set up and had Pizzas and soft drinks delivered to not only my crew, but another managers crew that worked with us often. I sent a stack of letters through one of the hourly employees wishing them well and letting them know how much I enjoyed working with them. The New plant manager, installed by the new owners, had his lawyer send me a letter forbidding any more contact with "HIS" employees, and threatening to have me arrested for trespassing. ( I was never there after I was terminated.) I mailed him a picture of me and 6 of his employees at a biker event with a letter asking him if he would like to be notified the next time we met.