I don't find it amusing, it puts extra work on those having to process! Again going devil's advocate and I just stress strongly in my personal opinion, referring back to the scenarios I posted and assuming your team sheet has 16 numbered rows. I'd find it hard to mitigate against a deliberate breach of the league rules. Slightly different from not getting a bit of paper and a fiver in the post. I would suggest if it did happen against your side, you complain in the exact same manner using the correct procedures referring to the correct rules. You can also look internally at how the squad make ups are, was there some bloke who played for the only time this season as a favour in say... The 5s that blocked a cascade upwards, freeing a 7th team spot for the extra player? That way the integrity of the rules remains. As I said to someone in passing once upon a time: "Everyone else does it, is not an excuse to do it." Fascinating debate though!