Date specific signatures?

[Silverwing]

So how do some websites allow that without people completely damaging them? 

[yasl]

Depends on how they do it.  Probably not by permitting embedded Javascript.  Do you have an example that I could examine?

[RainySunshine]

Depends on how they do it.  Probably not by permitting embedded Javascript.  Do you have an example that I could examine?

An example I can think of is on Tumblr, you can "Schedule" the exact time your posts are posted. 

[Death Blossom]

And everyone knows Tumblr is cancer.

[yasl]

Ah.  An explicit way of telling the website you want to schedule something is fine, the problem is specifically embedding user-supplied Javascript (or other code).

Of course, the problem with an explicit scheduling mechanism is that, as the app developer or website runner, you have to code the feature...

[Anyponedrawn]

Thank you for explaining this things in the simplest terms possible.  They are almost making sense to me.