I know we cannot blame the developers or investor's alone because sometimes bounty hunters dump the tokens and sometimes market doesn't favor. It's good to avoid ICOs for a while.
When it comes to a project to dump, it would take millions of dollars to be taken out of the project marketcap for it to be qualified as dumping, then ask me, how much exactly do these people allocate for hunters, and how many hunters really worked for them for it to have had major impact. The people dumping their project are still their investors that they have allocated thousands of the tokens to as gift.