Reddit forum system got this kind of thing, interesting to note

[UltimaOnline]

Your account has been given a warning.

We’ve been alerted to activity on your account(s) that is considered breaking Reddit’s rules.

We recently found that your account violated Rule 8 by repeatedly upvoting posts and/or comments that break Reddit's rule against encouraging or glorifying violence or physical harm.

While you didn’t post the rule-breaking content, upvoting content that breaks the rules is also considered a violation.

As a result, we’re issuing this warning and asking you to be thoughtful about any future content you upvote. Continued violations could result in a temporary or permanent ban.

Please familiarize yourself with Reddit’s rules to make sure you understand the rules for participating on Reddit.

This is an automated message; responses will not be received by Reddit admins.

 

[laksaboy]

Reddit is infested with libtards, LGBT lunatics and Trump haters.

 

[Hightech88]

Your account has been given a warning.

We’ve been alerted to activity on your account(s) that is considered breaking Reddit’s rules.

We recently found that your account violated Rule 8 by repeatedly upvoting posts and/or comments that break Reddit's rule against encouraging or glorifying violence or physical harm.

While you didn’t post the rule-breaking content, upvoting content that breaks the rules is also considered a violation.

As a result, we’re issuing this warning and asking you to be thoughtful about any future content you upvote. Continued violations could result in a temporary or permanent ban.

Please familiarize yourself with Reddit’s rules to make sure you understand the rules for participating on Reddit.

This is an automated message; responses will not be received by Reddit admins.

It's quite a fair policy as upvoting something which encourage or glorify violence means you are part of their supporters which helped to increase the harm on the target or victims involved.

Imagine if you are the target victim, how would you feel if some strangers or worse someone famous or your friends go and upvote the post?