[belltaco]

Not true. Only admins can see alt accounts(based on IP address), and they never reveal alt accounts of others to even mods.

[throwaway6734]

I've had new accounts banned for participating in subreddits where old accounts had been banned

[UncleSlacky]

Speaking as a Reddit mod, it's often possible to identify ban evaders through their use of language.

[throwaway6734]

This was a very large subreddit and my new account had very little content at the time