Taking legal action against employers

[GT03ROB]

I see a lot of threads on here with people having work issues & the stock response is often go legal. It's got me wondering. A lot of industries are very small and word spreads fast. If somebody goes legal against an employer, what has been the experience of how that has impacted future job prospects. I've always taken the view that it would make you un-employable, but thats based on nothing but gut instinct.

Anyone any experiences they'd like to share?