On StackExchange sites, a downvote indicates a bad or non-useful question/answer. A user with many downvotes may receive a question-ban or answer-ban to encourage better contributions. This makes complete sense.
Conversely, votes on Meta sites are used to express agreement or disagreement over a question or answer. Downvotes may not indicate a bad contribution, just an unpopular opinion.
I just received the "in danger of being blocked" warning on this site, Meta.SE. I don't think I am a bad contributor by most standards. All my questions and answers have been well-received and deemed useful on the non-Meta sites.
The current behavior severely limits people from expressing unpopular ideas or issues. See the related question, "That downvoted questions make you lose reputation limits diversity of opinion in Meta", which is similar but has a different focus.
This issue is very specific to Meta.SE, which is kind of a hybrid content+meta site. Is this something we want to consider? Should Meta.SE have different rules for bans because of the difference in context?