I have a question concerning voting in general: As far as I understand it you are not obliged to vote on proposals to get rewards. If the majority votes yes on a proposal to fund a project with f.e. 20% of the collected funds you also are 20% in on it with your tokens (even if you haven't voted or voted no). So my question is: What happens exactly if you vote "yes"? Do you get a higher percentage of rewards/dividend? Obviously if you don't agree with a proposal you burn your tokens and get back your Ether.
There is no higher percentage or bonus for voting Yes.
Whether you vote Yes/No or don't vote at all the majority vote will prevail and the funds will be taken as a percentage from everyone in the DAO's ETHER.
So if you vote against Slock.it and the proposal passes your ether will get used just like everyone else.
The only way to opt out of your ether being used is to split off from the DAO into your own separate DAO before the proposal is voted on.
Once that happens you will have no further involvement with the main DAO.
You will still earn profits from proposals that were passed while you were a member of the main DAO for as long as they continue (which could be forever in theory though obviously nothing lasts forever in practise).