The ​regex​ filter reads a list of regular expressions from this page; each regular expression (case sensitive) being on a separate line inside the code block. This uses the ​​Python syntax for regular expressions. See also this ​Wikipedia article. Submitted content will be assigned a negative score (“karma”) for each match, and the total karma determines whether a submission is rejected or not. This is a read only page, so contact a trac admin (see MAINTAINERS) if you want to add something.

(?i)quickbooks
(?i)viagra
(?i)kaspersky
(?i)customer.?support
(?i)customer.?care
(?i)customer.?service
(?i)help.?desk
(?i)help.?line
(?i)contact.?number
(?i)phone.?number
(?i)service.?number
(?i)toll.?free
(?i)great.?for.?FFMEPG.?to.?support.?265

(?i) means switch to case insensitive

.? means zero or one dot