Each like costs a transaction though. It's funding, not manipulating.
if we need to develop quality assessment /rating algorithms based on likes, user connectivity and some other values for future larger data sets, no one should be counted twice.
Check out memberapp.github.io, its another memo client with those extra features.
You can already filter out likes from the same account by using a block explorer. Democracy doesn't make sense for digital communities because digital identity is not solved.
nobody can prevent someone from writing an action in the blockchain several times ... but it should be ignored by the algorithm. Either I like or dislike something or I'm neutral.
That is a bad idea. If anything it is nice to be able to quantify how much you like something. Adding the tip is one way and multiple likes is another. Cost is a metric.
Funding whom? When you like something, you're donating to the miners. The person you like only receives funds if you send a tip.
People see the number of likes, that is what you're funding. In return you get the assurance that ppl have seen that memo with that number of likes next to it.
