As a trained scientist, I know the evidence for ID is nil, and As a trained scientist, you should too.
Yes, you can speculate about ID, you can speculate about space aliens too, but teaching ID or that space aliens exists in school is stupid.
There is a difference between being trained and being indoctrinated. Many scientists are incapable of original thought and spend their teaching what has been already established. The history of science is full of theories every bit as silly in retrospect as you claim ID to be, yet they were belligerently defended by the establishment at the time. I saw the mainstream in geology dismiss continental drift for decades. Now it is taught in grade school. I also saw preposterous ideas like "gravity tectonics" widely accepted as alternatives. Anyone familiar with the history of science should also know that beautiful and "firmly established" theories like Newtonian mechanics are eventually found lacking in some respect. So why the dogmatic, fierce, irrational adherence to Darwinism as the only theory which can be entertained?
I speak as a multi-degreed, highly trained scientist. I also have a successful and richly profitable 25-year career in life sciences devoted to new drug discovery to show for all that training.
If one who calls himself a scientist refuses to use his common sense to appreciate what is so obviously the work-product of an Intelligent Designer, competent scientists may conclude fairly that such a fool's ignorance is attribute-able to willfully compromised powers of observation, wedded as they are to a fundamentally weak premise.
Sadly, the condition more often than not also contributes to such a "scientist" becoming ever more willfully blind, as he only becomes proportionally more wise in his own conceit.