[borbole]

You can remove the image that allowes users to close the blocks and it will be unrevomable then. Give it a try and see if it does what you want, unless I misunderstood you.

At the FORUMEHOME template find and remove the following code or comment it out.

<a id="sidebar_button_link" href="#">
			<vb:if condition="$show['sidebarposition'] == 'left'">
			<img id="sidebar_button" src="{vb:stylevar imgdir_misc}/tab-collapsed-left.png" alt="" />
			<vb:else />
			<img id="sidebar_button" src="{vb:stylevar imgdir_misc}/tab-collapsed.png" alt="" />
			</vb:if>
		</a>

You can also make it so it can affect certain usergroups only by using the template conditionals here:

https://vborg.vbsupport.ru/showthread.php?t=231525