Well not to rub anybody the wrong way, but I'll just say not only do I know how to do it, I could do it, and in less time than it takes to explain why I didn't.
I feel the tech services on this forum are pretty darn good, and I'm not the tech guy either. I can tell you that any member here gets better tech services than any of us pay for.
I chose to leave them, just like I left many of my own pics with old PB links, because: (1) most people understand that we are a hobby/common interest site, not the Library of Congress. We do our best, as have others in the past, and they didn't have the Federal benefits and pension plan either, or a desk and a staff of flunkies to do anything asked.
(2) the digital environment changes constantly. I'd be the first to say that some tech staffs could keep up better. But even they replace big glitches with smaller ones sometimes, and restoring something from two years ago can become a committee and consultant project that concludes: "the system can't do that," which means they have no idea how to operate it or they don't want to bother. Of course they have already collected the paycheck that us hobbyists don't get.
We do our best. There is a lot of great stuff here. Some gets lost in the digital era. But I left those because I thought they were valuable contributions. We did not mishandle them, and as we saw with Photobucket, you never know how they might get dug up again. It isn't digging I am going to do, knowing that someone else will contribute something similar sooner or later.
Not all contributions stay in the main lobby of the museum anyhow, but you never know if they might be dusted off and displayed again. Throwing them away after sending the donor a thank you note is not good practice.
Then do it. This thread, and the other, is totally worthless without images.