Yeah it should be the teams share and why to blame hunters. They work for it within months, the difference is hunters invested their time and investors invest their money. Both have equal rights to sell anytime they want, really dont blame them because the main reason why the token dump, was from the team, lack of ability to manage the project within the situation.
Usually the numbers of bounties reward is small amount it is around 1% up to 5% max of total token supply, it is not enough for bounties hunters to dumping their coins on the market. I don't think it will gives bad affect to the price of token, so there are no reason for locking bounties reward after the ICOs end.