Last time I was in the Terraces lounge at Gatwick I had to endure a very loud South African man sitting beside me talking loudly into his phone. The lounge was busy so we couldn't move away.
I was travelling with my teenage daughter and the man repeatedly slipped profanities into the conversation he was having and after about the tenth time I made sure I made eye contact with him and loudly said "do you mind?" to him.
He didn't walk as he did any of this, more's the pity.