(adsbygoogle = window.adsbygoogle || []).push({}); Here's how to set Visitor Messaging to default instead of User activity as default.

1. Go into admincp
2. Go to plugins, select "Add New Plugin"
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3. Fill in the information like this
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    $_REQUEST['tab'] = 'visitor_messaging';

4. Go to profile
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Done, now it's better than before
Thanks for reading.

This is very simple to do :ha!:
Anyway, if you want the activity tab removed
Goto admincp > styles > pick the style > scroll down and go to Member Infos > MEMBERINFO > now find this code below

    vb:if condition="$blocks[activitystream]"><dd<vb:if condition="$selected_tab == 'activitystream' OR $selected_tab == ''"> class="userprof_module" <vb:else /> class="userprof_moduleinactive" </vb:if>><a id="activitystream-tab" href="{vb:link member, {vb:raw userinfo}, "tab=activitystream"}#activitystream" onclick="return tabViewPicker(this);">{vb:raw activity_phrase}</a></dd></vb:if>

Remove it, Enjoy. You now have Activity tab removed

You can actually disable it via Navigation settings

sick post +rep

You can, thats just the activity for the Forum. There might not be options for others but its just to help people who are having problem