During the summer of 2016, thrash metal band Megadeth was supposed to perform in a major festival in Hungary. In the last minute, the concert was canceled, because of a minor injury. It was hardly justifiable, because of the circumstances, which also included that the injured member was ready to perform, it was only the frontman, Dave Mustine, who decided to leave.
It was an extremely controversial situation (I was also at the place when it happened) and as a response Mustaine had an apologizing post on his Facebook page. However, as it was expectable, he got quite rude comments. I wouldn't say it extreme, but still, audience had no much forgiveness.
Almost surely because of it, he deleted the post some days later.
Is it good or bad practice?
I'd say good, because keeping access to comments depicting hatred can be harmful in a long-term.
I'd also say it's bad, because it's god damn lampshading. Pretending as if nothing happened, expressing no respect towards the audience.