Ministry of Magic representatives apprehended them as they were flying over Inverness and the Banchory Bangers never played again.
-- Quidditch Through the Ages (QA5)

After a match against the Appleby Arrows in 1814, the Bangers attempted to capture a Hebridean Black dragon as their team mascot. Their foolishness led to their being banned from playing ever again (QA5).
Commentary
Notes
The Banchory Bangers were known for their "post-match parties" (QA5). This one getting so out of hand must have been the last straw for the Ministry authorities.
Lexicon list of Quidditch teams
From the Web
WizardingWorld.com (Pottermore) features:
- The British and Irish Quidditch League
- Things you might not know about Quidditch
- Quidditch Through the Ages
Harry Potter Wiki: Quidditch
Pensieve (Comments)
Tags: banished chase dangerous foolishness illegal mascots Quidditch history rule-breaking