I've seen lot's of people who complain to bounty hunters who dump their tokens after they get them. Why hate them? They have all the rights to sell whenever they want and bounty allocations are only 1%-5% of the total supply of the coin. I don't think it will do much to lower the price of the coin. I mean it's even good for the ICO investors as they will have a chance to buy more tokens with lesser price than the ICO.
Holding the tokens also doesn't mean it will make you rich. Some tokens get abandon by the developers so it would be better to sell at a good price than be left hanging in the end.
You got the point here that investors are getting more cheap coins but they will only purchase if they have the guts to do so as most people get scared once they see the price falling and not invest in it again and some of those investors who are new in this also sell their tokens because they panic in the down market and don't implement their thinking and when they sell the coins and see the price increasing then they cry because of selling their tokens for too cheap and wasting their money.