There seem to be quite a few factors that influence search engines and vetting sites. In the past I've reg'd a few toxic names, and I've ended up dropping them, or selling them off at a discount.
Recently I picked up eLaunder.com , and that has a bad history of malware installation and other scams. It looked as if the dns had been intercepted, and surfers were being sent to a scam vault.
With all the hype about crypto currencies, I thought the name was worth reg fee, so I thought I'd see if |I could use it in some way. It was a lot easier than I thought, and the name now resolves to a basic Name Silo lander, so it's safe to visit the site now. It still has a lot of toxic history in the search engines though, and when I get the chance, I'll try to do something about that. In fact, this thread has given me the idea of using the site to discuss the laundering of toxic domain names.
More of a problem is the presence of "banned" words in a domain name. Leaving aside the obvious porn words, there are some that can cause a name to be blocked on a lot of the public WiFi and ISP filters. My domain FoxyTalk.com is one of these. I wanted to use it for a radio site in conjunction with my Fox Foo concept, but it seems the word "foxy" is a red light. I put a simple lander on the site, but I had to tether a mobile to do this in McDonalds, and I had to remove the adult filters to do this. Whilst this may not appear to be a problem at first sight, remember that a lot of businessmen stop for a coffee whilst travelling, and they often use the free WiFi. This can be a great time to get a sales message to them as they relax over a coffee.