How to detect Adblock on my Drupal website?
As of right now, there are no ad blocking modules on drupal.org, save for the dSero module, which is more of a proxy for the dSero service, thus, not really a solution for detecting adblock usage.

AdBlock detection is simple in practice; include markup regions (e.g. a div &amp; image sized to a standard 728x90 leaderboard ad size) and/or execute JavaScript (e.g. running JS called ad.js) that triggers the AdBlocker to hide it, then having some other isolated code check if region was hidden or the JS code was executed.

With that known, any Drupal based solutions are going to involve either finding an existing front-end library (e.g. FuckAdBlock) or creating your own. Given that any popular solution is ultimately self-defeating (e.g. the AdBlock updating its code to check for common Anti-AdBlocking tactics/libraries), you're probably better off creating your own custom front-end solution that catches ad blocking.