$ctxid when and why?

    Hi barracudas,

I want you to ask about the $ctxid parameter. As i see this is used to
persist the event context in more than request-response cyles.
I don't understand why this is needed.
My understanding of the EventContext is that it should be used to pass
objects
 from Control Event Handlers to View Event Handlers.
These objects would be distroyed when the request-response cycle has ended.
My assumption is correct?
I would be surpised to find out that the Objects put in the EventContext not
getting released
and garbage collected.
I just found out that throwing a ClientSideRedirectException to a static
html page would
look like this: ourpage.html?$ctxid=_5523212233
How can i disable the persist of the context?

Thank you,

Andras.