Trigger words: rent-seeking
Indicator sentences: Not really. I'd call it speculation. Rent seeking is generally reserved for attempting to alter regulatory structures and such.
Negotiation parts: That is not the definition of rent seeking, as scalping tickets doesn't involve any manipulation of the social or regulatory environments. Arbitrage is not automatically rent seeking. And arbitrage of tickets isn't necessarily no value added.
Indicator sentences: Can you elaborate more on what "an overall negative effect on the market" means?