You are going to block this site. This will do the following:
- You will no longer see this site in searches.
- Site will no longer see your site in searches.
- Site will not be able to comment on your site profile.
- Any comments this site has posted to your profile will not be displayed.
Are you sure you want to do this?
If you want one. I like them, but web usability experts say they're bad. (The create an extra click.) They work best when directing visitors to different versions of the same site, like the different languag versions of Wikipedia: https://www.wikipedia.org/
They are also handy for putting web rings on without confusing your main page, plus its simpler for people switching ring sites.
If it fits the aesthetic of/makes sense within the context of your website or you want a special entrance or if you want to inform visitors of something before they reach the main page, then yes.