Wy do people criticise people that think out side the box, that explore the borders of reality and science?

[Joel]

Some people belive them selfs to know every thing that is to know abaut something but science and theories qeep changing has we discover new things sow can some one realy criticise some one for exploring the borders of science?

[larrybud2004]

There's no problem thinking outside the box, however you must be able to PROVE your assertion with logical thinking and scientific proof.

[L. E. Gant]

As Arthur C Clark put it:
When a scientist states that something is possible, you can be almost 100% sure they are right; when the same scientist says something is impossible, the probability is almost 100% that he is wrong.

To think outside the box, you have to know the box. New discoveries are never inside the box, but always close to the box's limits. But if you don't know the box, you can't discover something new -

99.99999% of the people who complain about others not considering something new as real or scientific haven't looked inside the box that is modern science!