add(faq): public tracker disclaimer in faq

docs/basics/faq-troubleshooting.md

@@ -13,6 +13,16 @@ possible you've got rate-limited so you might want to try again later.
 Otherwise, just ignore it. There's nothing cross-seed will be able to do to fix
 it.
 
+### Does cross-seed work on public trackers?
+
+While it is possible, in some cases, for you to cross-seed on public trackers; the majority of public trackers are serving the same torrent file (identical infohash) with different announce URLs. This results in cross-seed seeing what you would assume are matches on different trackers as being torrents you already have in your client. These "matches" will therefore be excluded in cross-seed's decisions. The torrent clients we support also do not allow for multiple torrents to be added with the same infohash, so it is entirely outside of our control, even if we somehow were able to support matching identical infohashes.
+
+Another problem is the naming schemes (or lack of one) that the majority of public trackers use. Due to the nature of "anyone can upload", you will get individuals or bots tagging releases with their names, or just otherwise butchering the naming conventions we depend on for properly parsing and matching torrents.
+
+Finally, given that there is no direct, lasting, benefit to you for cross-seeding on public trackers, as there is no account, ratio, reputation, or upload directly associated with you, the benefit YOU will receive if any matches are found is almost non-existent.
+
+All of these factors combine to yield extremely limited results, if any, and the inability, for us, to provide support beyond initial configurations and set up for use on public trackers.
+
 ### Why do I get `Unsupported: magnet link detected at…`?
 
 `cross-seed` does not support the usage of magnet links. If your indexer supports torrent files you will need to switch your settings.

docs/basics/getting-started.md

@@ -10,6 +10,11 @@ Cross-seeding is the term used for downloading a torrent from one tracker and th
 
 Since you already have the torrent's files, this results in zero download and instant seeding. This is a great way to build ratio (especially on your new trackers) and contribute to the torrenting community.
 
+:::info
+This software is designed to work mainly with private trackers. If you are attempting to cross-seed on public trackers, please see our [FAQ entry](./faq-troubleshooting.md#does-cross-seed-work-on-public-trackers) for details before proceeding.
+
+:::
+
 :::danger
 Certain `cross-seed` configurations can result in downloading an excessive number of torrent files in a short amount of time. Trackers may, as a result, forbid this or require specific settings to minimize this behavior as much as possible.