Jonel's edits are 1 or 2 minutes apart. It's impossible to properly evaluate an article in that time.
Considering that the only way you can really remove a fact tag is by going and looking for sources, I have to agree. Adding a source might take only a couple of minutes, but removing the statement as unsourced takes longer, since you need to try and fail to find a source. When I'm removing fact tags I usually look at at least the first couple of pages of a couple of google searches, reading any relevant pages, before deciding that there are no obvious sources and removing it. (If a piece of information cannot be easily found on google, then it is obscure enough to require a proper source by anyone adding it.)
That would probably take me 5 to 10 minutes per statement. Of course, if it's a particularly unlikely or derogatory statement, I might be a little less tolerant and only look at the first page of one google search and then remove it - if you're going to add something unlikely or negative to an article, then burden is very much on your to provide a source. (The burden is always on the person adding the information, of course, but I'm a little more tolerant in other cases.)